1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b799572856aa7dcd0a36e351244e59ed43544c1cb52fbf49c6f90220076ae. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15e681c5-c7ee-4686-9590-d5b256b846a9.json and https://artists.proofprofile.net/proofs/artist/15e681c5-c7ee-4686-9590-d5b256b846a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd2eb2546f81ba601ac00c846867692ac18eb36f93d02c25569388615712432. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:47:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2569306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f317dfc842cb37d8632a307dd84acc966435463d5bd02ffeabeedd0e9e86d87. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2502703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd4edcf2c827ebef1c7f0a7cc86ced3ab90d9e34c50746c8d2db1d3f43bc46. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHP2523488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5388f152ae320cda91798e8c1c07503d48d8a76cd42ee1eaca0f65279c3f0028. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDW2502285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e70f7b370458330d32f1394b7f35b9d2ab19ceff3a702201fe8e8491bef7c7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWDW2512211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f53b59843a431ff0d70bff13cbbfbf0516f7e79d34b85f3fd830fd0574058e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2597666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f53b59843a431ff0d70bff13cbbfbf0516f7e79d34b85f3fd830fd0574058e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2597666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340c23fb53177764c2be91c91b46e02173a0a27c3acfb0166c41bb5f2f6fee7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92576860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a79ac8431b6bbf40530623f43ad8b91b8b6dc0a567f6f629c875f91dc7581fd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:57:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52545575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b18c084f24ee29b7abd82e3b3fd4f0eed53e18dcf82c76e0932fe65bf167119. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92576861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65fc36bed3ea796dc27f170b9818880ee754070c9b500a96d2653c10e184306. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92576862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aef8426732bdc014fee8d1537848abcebbfff79759701ae47fbe61e2c7378ef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB92576863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a29291f2ca637e86f2cd22fbe10bdc9f73e3861a38fab584763761ede783ae. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTBE2571537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954420b0f248149e2303398b04d60e044379092d3867e1337070674af2b52c51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2552649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33827b3d7f5ec0edb5dcc94964ca5ec0ab974a3f008ae3b943b99a7c1a2618e6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2552650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba02bbbbd77dab2bdeadfd5731a5eed8df65fd5b7c68cebe261c621acdbb1ac9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2552651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d18e5b7e05e8984adb0b8e2821f205e9ad7be9cb1cdfdc938f825ae5516e1db. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2552653.